drivers/media/dvb-frontends/dib3000mc.c

   1 /*
   2  * Driver for DiBcom DiB3000MC/P-demodulator.
   3  *
   4  * Copyright (C) 2004-7 DiBcom (http://www.dibcom.fr/)
   5  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
   6  *
   7  * This code is partially based on the previous dib3000mc.c .
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License as
  11  *      published by the Free Software Foundation, version 2.
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/i2c.h>
  19
  20 #include "dvb_frontend.h"
  21
  22 #include "dib3000mc.h"
  23
  24 static int debug;
  25 module_param(debug, int, 0644);
  26 MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
  27
  28 static int buggy_sfn_workaround;
  29 module_param(buggy_sfn_workaround, int, 0644);
  30 MODULE_PARM_DESC(buggy_sfn_workaround, "Enable work-around for buggy SFNs (default: 0)");
  31
  32 #define dprintk(fmt, arg...) do {                                       \
  33         if (debug)                                                      \
  34                 printk(KERN_DEBUG pr_fmt("%s: " fmt),                   \
  35                        __func__, ##arg);                                \
  36 } while (0)
  37
  38 struct dib3000mc_state {
  39         struct dvb_frontend demod;
  40         struct dib3000mc_config *cfg;
  41
  42         u8 i2c_addr;
  43         struct i2c_adapter *i2c_adap;
  44
  45         struct dibx000_i2c_master i2c_master;
  46
  47         u32 timf;
  48
  49         u32 current_bandwidth;
  50
  51         u16 dev_id;
  52
  53         u8 sfn_workaround_active :1;
  54 };
  55
  56 static u16 dib3000mc_read_word(struct dib3000mc_state *state, u16 reg)
  57 {
  58         struct i2c_msg msg[2] = {
  59                 { .addr = state->i2c_addr >> 1, .flags = 0,        .len = 2 },
  60                 { .addr = state->i2c_addr >> 1, .flags = I2C_M_RD, .len = 2 },
  61         };
  62         u16 word;
  63         u8 *b;
  64
  65         b = kmalloc(4, GFP_KERNEL);
  66         if (!b)
  67                 return 0;
  68
  69         b[0] = (reg >> 8) | 0x80;
  70         b[1] = reg;
  71         b[2] = 0;
  72         b[3] = 0;
  73
  74         msg[0].buf = b;
  75         msg[1].buf = b + 2;
  76
  77         if (i2c_transfer(state->i2c_adap, msg, 2) != 2)
  78                 dprintk("i2c read error on %d\n",reg);
  79
  80         word = (b[2] << 8) | b[3];
  81         kfree(b);
  82
  83         return word;
  84 }
  85
  86 static int dib3000mc_write_word(struct dib3000mc_state *state, u16 reg, u16 val)
  87 {
  88         struct i2c_msg msg = {
  89                 .addr = state->i2c_addr >> 1, .flags = 0, .len = 4
  90         };
  91         int rc;
  92         u8 *b;
  93
  94         b = kmalloc(4, GFP_KERNEL);
  95         if (!b)
  96                 return -ENOMEM;
  97
  98         b[0] = reg >> 8;
  99         b[1] = reg;
 100         b[2] = val >> 8;
 101         b[3] = val;
 102
 103         msg.buf = b;
 104
 105         rc = i2c_transfer(state->i2c_adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
 106         kfree(b);
 107
 108         return rc;
 109 }
 110
 111 static int dib3000mc_identify(struct dib3000mc_state *state)
 112 {
 113         u16 value;
 114         if ((value = dib3000mc_read_word(state, 1025)) != 0x01b3) {
 115                 dprintk("-E-  DiB3000MC/P: wrong Vendor ID (read=0x%x)\n",value);
 116                 return -EREMOTEIO;
 117         }
 118
 119         value = dib3000mc_read_word(state, 1026);
 120         if (value != 0x3001 && value != 0x3002) {
 121                 dprintk("-E-  DiB3000MC/P: wrong Device ID (%x)\n",value);
 122                 return -EREMOTEIO;
 123         }
 124         state->dev_id = value;
 125
 126         dprintk("-I-  found DiB3000MC/P: %x\n",state->dev_id);
 127
 128         return 0;
 129 }
 130
 131 static int dib3000mc_set_timing(struct dib3000mc_state *state, s16 nfft, u32 bw, u8 update_offset)
 132 {
 133         u32 timf;
 134
 135         if (state->timf == 0) {
 136                 timf = 1384402; // default value for 8MHz
 137                 if (update_offset)
 138                         msleep(200); // first time we do an update
 139         } else
 140                 timf = state->timf;
 141
 142         timf *= (bw / 1000);
 143
 144         if (update_offset) {
 145                 s16 tim_offs = dib3000mc_read_word(state, 416);
 146
 147                 if (tim_offs &  0x2000)
 148                         tim_offs -= 0x4000;
 149
 150                 if (nfft == TRANSMISSION_MODE_2K)
 151                         tim_offs *= 4;
 152
 153                 timf += tim_offs;
 154                 state->timf = timf / (bw / 1000);
 155         }
 156
 157         dprintk("timf: %d\n", timf);
 158
 159         dib3000mc_write_word(state, 23, (u16) (timf >> 16));
 160         dib3000mc_write_word(state, 24, (u16) (timf      ) & 0xffff);
 161
 162         return 0;
 163 }
 164
 165 static int dib3000mc_setup_pwm_state(struct dib3000mc_state *state)
 166 {
 167         u16 reg_51, reg_52 = state->cfg->agc->setup & 0xfefb;
 168         if (state->cfg->pwm3_inversion) {
 169                 reg_51 =  (2 << 14) | (0 << 10) | (7 << 6) | (2 << 2) | (2 << 0);
 170                 reg_52 |= (1 << 2);
 171         } else {
 172                 reg_51 = (2 << 14) | (4 << 10) | (7 << 6) | (2 << 2) | (2 << 0);
 173                 reg_52 |= (1 << 8);
 174         }
 175         dib3000mc_write_word(state, 51, reg_51);
 176         dib3000mc_write_word(state, 52, reg_52);
 177
 178         if (state->cfg->use_pwm3)
 179                 dib3000mc_write_word(state, 245, (1 << 3) | (1 << 0));
 180         else
 181                 dib3000mc_write_word(state, 245, 0);
 182
 183         dib3000mc_write_word(state, 1040, 0x3);
 184         return 0;
 185 }
 186
 187 static int dib3000mc_set_output_mode(struct dib3000mc_state *state, int mode)
 188 {
 189         int    ret = 0;
 190         u16 fifo_threshold = 1792;
 191         u16 outreg = 0;
 192         u16 outmode = 0;
 193         u16 elecout = 1;
 194         u16 smo_reg = dib3000mc_read_word(state, 206) & 0x0010; /* keep the pid_parse bit */
 195
 196         dprintk("-I-  Setting output mode for demod %p to %d\n",
 197                         &state->demod, mode);
 198
 199         switch (mode) {
 200                 case OUTMODE_HIGH_Z:  // disable
 201                         elecout = 0;
 202                         break;
 203                 case OUTMODE_MPEG2_PAR_GATED_CLK:   // STBs with parallel gated clock
 204                         outmode = 0;
 205                         break;
 206                 case OUTMODE_MPEG2_PAR_CONT_CLK:    // STBs with parallel continues clock
 207                         outmode = 1;
 208                         break;
 209                 case OUTMODE_MPEG2_SERIAL:          // STBs with serial input
 210                         outmode = 2;
 211                         break;
 212                 case OUTMODE_MPEG2_FIFO:            // e.g. USB feeding
 213                         elecout = 3;
 214                         /*ADDR @ 206 :
 215                         P_smo_error_discard  [1;6:6] = 0
 216                         P_smo_rs_discard     [1;5:5] = 0
 217                         P_smo_pid_parse      [1;4:4] = 0
 218                         P_smo_fifo_flush     [1;3:3] = 0
 219                         P_smo_mode           [2;2:1] = 11
 220                         P_smo_ovf_prot       [1;0:0] = 0
 221                         */
 222                         smo_reg |= 3 << 1;
 223                         fifo_threshold = 512;
 224                         outmode = 5;
 225                         break;
 226                 case OUTMODE_DIVERSITY:
 227                         outmode = 4;
 228                         elecout = 1;
 229                         break;
 230                 default:
 231                         dprintk("Unhandled output_mode passed to be set for demod %p\n",&state->demod);
 232                         outmode = 0;
 233                         break;
 234         }
 235
 236         if ((state->cfg->output_mpeg2_in_188_bytes))
 237                 smo_reg |= (1 << 5); // P_smo_rs_discard     [1;5:5] = 1
 238
 239         outreg = dib3000mc_read_word(state, 244) & 0x07FF;
 240         outreg |= (outmode << 11);
 241         ret |= dib3000mc_write_word(state,  244, outreg);
 242         ret |= dib3000mc_write_word(state,  206, smo_reg);   /*smo_ mode*/
 243         ret |= dib3000mc_write_word(state,  207, fifo_threshold); /* synchronous fread */
 244         ret |= dib3000mc_write_word(state, 1040, elecout);         /* P_out_cfg */
 245         return ret;
 246 }
 247
 248 static int dib3000mc_set_bandwidth(struct dib3000mc_state *state, u32 bw)
 249 {
 250         u16 bw_cfg[6] = { 0 };
 251         u16 imp_bw_cfg[3] = { 0 };
 252         u16 reg;
 253
 254 /* settings here are for 27.7MHz */
 255         switch (bw) {
 256                 case 8000:
 257                         bw_cfg[0] = 0x0019; bw_cfg[1] = 0x5c30; bw_cfg[2] = 0x0054; bw_cfg[3] = 0x88a0; bw_cfg[4] = 0x01a6; bw_cfg[5] = 0xab20;
 258                         imp_bw_cfg[0] = 0x04db; imp_bw_cfg[1] = 0x00db; imp_bw_cfg[2] = 0x00b7;
 259                         break;
 260
 261                 case 7000:
 262                         bw_cfg[0] = 0x001c; bw_cfg[1] = 0xfba5; bw_cfg[2] = 0x0060; bw_cfg[3] = 0x9c25; bw_cfg[4] = 0x01e3; bw_cfg[5] = 0x0cb7;
 263                         imp_bw_cfg[0] = 0x04c0; imp_bw_cfg[1] = 0x00c0; imp_bw_cfg[2] = 0x00a0;
 264                         break;
 265
 266                 case 6000:
 267                         bw_cfg[0] = 0x0021; bw_cfg[1] = 0xd040; bw_cfg[2] = 0x0070; bw_cfg[3] = 0xb62b; bw_cfg[4] = 0x0233; bw_cfg[5] = 0x8ed5;
 268                         imp_bw_cfg[0] = 0x04a5; imp_bw_cfg[1] = 0x00a5; imp_bw_cfg[2] = 0x0089;
 269                         break;
 270
 271                 case 5000:
 272                         bw_cfg[0] = 0x0028; bw_cfg[1] = 0x9380; bw_cfg[2] = 0x0087; bw_cfg[3] = 0x4100; bw_cfg[4] = 0x02a4; bw_cfg[5] = 0x4500;
 273                         imp_bw_cfg[0] = 0x0489; imp_bw_cfg[1] = 0x0089; imp_bw_cfg[2] = 0x0072;
 274                         break;
 275
 276                 default: return -EINVAL;
 277         }
 278
 279         for (reg = 6; reg < 12; reg++)
 280                 dib3000mc_write_word(state, reg, bw_cfg[reg - 6]);
 281         dib3000mc_write_word(state, 12, 0x0000);
 282         dib3000mc_write_word(state, 13, 0x03e8);
 283         dib3000mc_write_word(state, 14, 0x0000);
 284         dib3000mc_write_word(state, 15, 0x03f2);
 285         dib3000mc_write_word(state, 16, 0x0001);
 286         dib3000mc_write_word(state, 17, 0xb0d0);
 287         // P_sec_len
 288         dib3000mc_write_word(state, 18, 0x0393);
 289         dib3000mc_write_word(state, 19, 0x8700);
 290
 291         for (reg = 55; reg < 58; reg++)
 292                 dib3000mc_write_word(state, reg, imp_bw_cfg[reg - 55]);
 293
 294         // Timing configuration
 295         dib3000mc_set_timing(state, TRANSMISSION_MODE_2K, bw, 0);
 296
 297         return 0;
 298 }
 299
 300 static u16 impulse_noise_val[29] =
 301
 302 {
 303         0x38, 0x6d9, 0x3f28, 0x7a7, 0x3a74, 0x196, 0x32a, 0x48c, 0x3ffe, 0x7f3,
 304         0x2d94, 0x76, 0x53d, 0x3ff8, 0x7e3, 0x3320, 0x76, 0x5b3, 0x3feb, 0x7d2,
 305         0x365e, 0x76, 0x48c, 0x3ffe, 0x5b3, 0x3feb, 0x76, 0x0000, 0xd
 306 };
 307
 308 static void dib3000mc_set_impulse_noise(struct dib3000mc_state *state, u8 mode, s16 nfft)
 309 {
 310         u16 i;
 311         for (i = 58; i < 87; i++)
 312                 dib3000mc_write_word(state, i, impulse_noise_val[i-58]);
 313
 314         if (nfft == TRANSMISSION_MODE_8K) {
 315                 dib3000mc_write_word(state, 58, 0x3b);
 316                 dib3000mc_write_word(state, 84, 0x00);
 317                 dib3000mc_write_word(state, 85, 0x8200);
 318         }
 319
 320         dib3000mc_write_word(state, 34, 0x1294);
 321         dib3000mc_write_word(state, 35, 0x1ff8);
 322         if (mode == 1)
 323                 dib3000mc_write_word(state, 55, dib3000mc_read_word(state, 55) | (1 << 10));
 324 }
 325
 326 static int dib3000mc_init(struct dvb_frontend *demod)
 327 {
 328         struct dib3000mc_state *state = demod->demodulator_priv;
 329         struct dibx000_agc_config *agc = state->cfg->agc;
 330
 331         // Restart Configuration
 332         dib3000mc_write_word(state, 1027, 0x8000);
 333         dib3000mc_write_word(state, 1027, 0x0000);
 334
 335         // power up the demod + mobility configuration
 336         dib3000mc_write_word(state, 140, 0x0000);
 337         dib3000mc_write_word(state, 1031, 0);
 338
 339         if (state->cfg->mobile_mode) {
 340                 dib3000mc_write_word(state, 139,  0x0000);
 341                 dib3000mc_write_word(state, 141,  0x0000);
 342                 dib3000mc_write_word(state, 175,  0x0002);
 343                 dib3000mc_write_word(state, 1032, 0x0000);
 344         } else {
 345                 dib3000mc_write_word(state, 139,  0x0001);
 346                 dib3000mc_write_word(state, 141,  0x0000);
 347                 dib3000mc_write_word(state, 175,  0x0000);
 348                 dib3000mc_write_word(state, 1032, 0x012C);
 349         }
 350         dib3000mc_write_word(state, 1033, 0x0000);
 351
 352         // P_clk_cfg
 353         dib3000mc_write_word(state, 1037, 0x3130);
 354
 355         // other configurations
 356
 357         // P_ctrl_sfreq
 358         dib3000mc_write_word(state, 33, (5 << 0));
 359         dib3000mc_write_word(state, 88, (1 << 10) | (0x10 << 0));
 360
 361         // Phase noise control
 362         // P_fft_phacor_inh, P_fft_phacor_cpe, P_fft_powrange
 363         dib3000mc_write_word(state, 99, (1 << 9) | (0x20 << 0));
 364
 365         if (state->cfg->phase_noise_mode == 0)
 366                 dib3000mc_write_word(state, 111, 0x00);
 367         else
 368                 dib3000mc_write_word(state, 111, 0x02);
 369
 370         // P_agc_global
 371         dib3000mc_write_word(state, 50, 0x8000);
 372
 373         // agc setup misc
 374         dib3000mc_setup_pwm_state(state);
 375
 376         // P_agc_counter_lock
 377         dib3000mc_write_word(state, 53, 0x87);
 378         // P_agc_counter_unlock
 379         dib3000mc_write_word(state, 54, 0x87);
 380
 381         /* agc */
 382         dib3000mc_write_word(state, 36, state->cfg->max_time);
 383         dib3000mc_write_word(state, 37, (state->cfg->agc_command1 << 13) | (state->cfg->agc_command2 << 12) | (0x1d << 0));
 384         dib3000mc_write_word(state, 38, state->cfg->pwm3_value);
 385         dib3000mc_write_word(state, 39, state->cfg->ln_adc_level);
 386
 387         // set_agc_loop_Bw
 388         dib3000mc_write_word(state, 40, 0x0179);
 389         dib3000mc_write_word(state, 41, 0x03f0);
 390
 391         dib3000mc_write_word(state, 42, agc->agc1_max);
 392         dib3000mc_write_word(state, 43, agc->agc1_min);
 393         dib3000mc_write_word(state, 44, agc->agc2_max);
 394         dib3000mc_write_word(state, 45, agc->agc2_min);
 395         dib3000mc_write_word(state, 46, (agc->agc1_pt1 << 8) | agc->agc1_pt2);
 396         dib3000mc_write_word(state, 47, (agc->agc1_slope1 << 8) | agc->agc1_slope2);
 397         dib3000mc_write_word(state, 48, (agc->agc2_pt1 << 8) | agc->agc2_pt2);
 398         dib3000mc_write_word(state, 49, (agc->agc2_slope1 << 8) | agc->agc2_slope2);
 399
 400 // Begin: TimeOut registers
 401         // P_pha3_thres
 402         dib3000mc_write_word(state, 110, 3277);
 403         // P_timf_alpha = 6, P_corm_alpha = 6, P_corm_thres = 0x80
 404         dib3000mc_write_word(state,  26, 0x6680);
 405         // lock_mask0
 406         dib3000mc_write_word(state, 1, 4);
 407         // lock_mask1
 408         dib3000mc_write_word(state, 2, 4);
 409         // lock_mask2
 410         dib3000mc_write_word(state, 3, 0x1000);
 411         // P_search_maxtrial=1
 412         dib3000mc_write_word(state, 5, 1);
 413
 414         dib3000mc_set_bandwidth(state, 8000);
 415
 416         // div_lock_mask
 417         dib3000mc_write_word(state,  4, 0x814);
 418
 419         dib3000mc_write_word(state, 21, (1 << 9) | 0x164);
 420         dib3000mc_write_word(state, 22, 0x463d);
 421
 422         // Spurious rm cfg
 423         // P_cspu_regul, P_cspu_win_cut
 424         dib3000mc_write_word(state, 120, 0x200f);
 425         // P_adp_selec_monit
 426         dib3000mc_write_word(state, 134, 0);
 427
 428         // Fec cfg
 429         dib3000mc_write_word(state, 195, 0x10);
 430
 431         // diversity register: P_dvsy_sync_wait..
 432         dib3000mc_write_word(state, 180, 0x2FF0);
 433
 434         // Impulse noise configuration
 435         dib3000mc_set_impulse_noise(state, 0, TRANSMISSION_MODE_8K);
 436
 437         // output mode set-up
 438         dib3000mc_set_output_mode(state, OUTMODE_HIGH_Z);
 439
 440         /* close the i2c-gate */
 441         dib3000mc_write_word(state, 769, (1 << 7) );
 442
 443         return 0;
 444 }
 445
 446 static int dib3000mc_sleep(struct dvb_frontend *demod)
 447 {
 448         struct dib3000mc_state *state = demod->demodulator_priv;
 449
 450         dib3000mc_write_word(state, 1031, 0xFFFF);
 451         dib3000mc_write_word(state, 1032, 0xFFFF);
 452         dib3000mc_write_word(state, 1033, 0xFFF0);
 453
 454         return 0;
 455 }
 456
 457 static void dib3000mc_set_adp_cfg(struct dib3000mc_state *state, s16 qam)
 458 {
 459         u16 cfg[4] = { 0 },reg;
 460         switch (qam) {
 461                 case QPSK:
 462                         cfg[0] = 0x099a; cfg[1] = 0x7fae; cfg[2] = 0x0333; cfg[3] = 0x7ff0;
 463                         break;
 464                 case QAM_16:
 465                         cfg[0] = 0x023d; cfg[1] = 0x7fdf; cfg[2] = 0x00a4; cfg[3] = 0x7ff0;
 466                         break;
 467                 case QAM_64:
 468                         cfg[0] = 0x0148; cfg[1] = 0x7ff0; cfg[2] = 0x00a4; cfg[3] = 0x7ff8;
 469                         break;
 470         }
 471         for (reg = 129; reg < 133; reg++)
 472                 dib3000mc_write_word(state, reg, cfg[reg - 129]);
 473 }
 474
 475 static void dib3000mc_set_channel_cfg(struct dib3000mc_state *state,
 476                                       struct dtv_frontend_properties *ch, u16 seq)
 477 {
 478         u16 value;
 479         u32 bw = BANDWIDTH_TO_KHZ(ch->bandwidth_hz);
 480
 481         dib3000mc_set_bandwidth(state, bw);
 482         dib3000mc_set_timing(state, ch->transmission_mode, bw, 0);
 483
 484 #if 1
 485         dib3000mc_write_word(state, 100, (16 << 6) + 9);
 486 #else
 487         if (boost)
 488                 dib3000mc_write_word(state, 100, (11 << 6) + 6);
 489         else
 490                 dib3000mc_write_word(state, 100, (16 << 6) + 9);
 491 #endif
 492
 493         dib3000mc_write_word(state, 1027, 0x0800);
 494         dib3000mc_write_word(state, 1027, 0x0000);
 495
 496         //Default cfg isi offset adp
 497         dib3000mc_write_word(state, 26,  0x6680);
 498         dib3000mc_write_word(state, 29,  0x1273);
 499         dib3000mc_write_word(state, 33,       5);
 500         dib3000mc_set_adp_cfg(state, QAM_16);
 501         dib3000mc_write_word(state, 133,  15564);
 502
 503         dib3000mc_write_word(state, 12 , 0x0);
 504         dib3000mc_write_word(state, 13 , 0x3e8);
 505         dib3000mc_write_word(state, 14 , 0x0);
 506         dib3000mc_write_word(state, 15 , 0x3f2);
 507
 508         dib3000mc_write_word(state, 93,0);
 509         dib3000mc_write_word(state, 94,0);
 510         dib3000mc_write_word(state, 95,0);
 511         dib3000mc_write_word(state, 96,0);
 512         dib3000mc_write_word(state, 97,0);
 513         dib3000mc_write_word(state, 98,0);
 514
 515         dib3000mc_set_impulse_noise(state, 0, ch->transmission_mode);
 516
 517         value = 0;
 518         switch (ch->transmission_mode) {
 519                 case TRANSMISSION_MODE_2K: value |= (0 << 7); break;
 520                 default:
 521                 case TRANSMISSION_MODE_8K: value |= (1 << 7); break;
 522         }
 523         switch (ch->guard_interval) {
 524                 case GUARD_INTERVAL_1_32: value |= (0 << 5); break;
 525                 case GUARD_INTERVAL_1_16: value |= (1 << 5); break;
 526                 case GUARD_INTERVAL_1_4:  value |= (3 << 5); break;
 527                 default:
 528                 case GUARD_INTERVAL_1_8:  value |= (2 << 5); break;
 529         }
 530         switch (ch->modulation) {
 531                 case QPSK:  value |= (0 << 3); break;
 532                 case QAM_16: value |= (1 << 3); break;
 533                 default:
 534                 case QAM_64: value |= (2 << 3); break;
 535         }
 536         switch (HIERARCHY_1) {
 537                 case HIERARCHY_2: value |= 2; break;
 538                 case HIERARCHY_4: value |= 4; break;
 539                 default:
 540                 case HIERARCHY_1: value |= 1; break;
 541         }
 542         dib3000mc_write_word(state, 0, value);
 543         dib3000mc_write_word(state, 5, (1 << 8) | ((seq & 0xf) << 4));
 544
 545         value = 0;
 546         if (ch->hierarchy == 1)
 547                 value |= (1 << 4);
 548         if (1 == 1)
 549                 value |= 1;
 550         switch ((ch->hierarchy == 0 || 1 == 1) ? ch->code_rate_HP : ch->code_rate_LP) {
 551                 case FEC_2_3: value |= (2 << 1); break;
 552                 case FEC_3_4: value |= (3 << 1); break;
 553                 case FEC_5_6: value |= (5 << 1); break;
 554                 case FEC_7_8: value |= (7 << 1); break;
 555                 default:
 556                 case FEC_1_2: value |= (1 << 1); break;
 557         }
 558         dib3000mc_write_word(state, 181, value);
 559
 560         // diversity synchro delay add 50% SFN margin
 561         switch (ch->transmission_mode) {
 562                 case TRANSMISSION_MODE_8K: value = 256; break;
 563                 case TRANSMISSION_MODE_2K:
 564                 default: value = 64; break;
 565         }
 566         switch (ch->guard_interval) {
 567                 case GUARD_INTERVAL_1_16: value *= 2; break;
 568                 case GUARD_INTERVAL_1_8:  value *= 4; break;
 569                 case GUARD_INTERVAL_1_4:  value *= 8; break;
 570                 default:
 571                 case GUARD_INTERVAL_1_32: value *= 1; break;
 572         }
 573         value <<= 4;
 574         value |= dib3000mc_read_word(state, 180) & 0x000f;
 575         dib3000mc_write_word(state, 180, value);
 576
 577         // restart demod
 578         value = dib3000mc_read_word(state, 0);
 579         dib3000mc_write_word(state, 0, value | (1 << 9));
 580         dib3000mc_write_word(state, 0, value);
 581
 582         msleep(30);
 583
 584         dib3000mc_set_impulse_noise(state, state->cfg->impulse_noise_mode, ch->transmission_mode);
 585 }
 586
 587 static int dib3000mc_autosearch_start(struct dvb_frontend *demod)
 588 {
 589         struct dtv_frontend_properties *chan = &demod->dtv_property_cache;
 590         struct dib3000mc_state *state = demod->demodulator_priv;
 591         u16 reg;
 592 //      u32 val;
 593         struct dtv_frontend_properties schan;
 594
 595         schan = *chan;
 596
 597         /* TODO what is that ? */
 598
 599         /* a channel for autosearch */
 600         schan.transmission_mode = TRANSMISSION_MODE_8K;
 601         schan.guard_interval = GUARD_INTERVAL_1_32;
 602         schan.modulation = QAM_64;
 603         schan.code_rate_HP = FEC_2_3;
 604         schan.code_rate_LP = FEC_2_3;
 605         schan.hierarchy = 0;
 606
 607         dib3000mc_set_channel_cfg(state, &schan, 11);
 608
 609         reg = dib3000mc_read_word(state, 0);
 610         dib3000mc_write_word(state, 0, reg | (1 << 8));
 611         dib3000mc_read_word(state, 511);
 612         dib3000mc_write_word(state, 0, reg);
 613
 614         return 0;
 615 }
 616
 617 static int dib3000mc_autosearch_is_irq(struct dvb_frontend *demod)
 618 {
 619         struct dib3000mc_state *state = demod->demodulator_priv;
 620         u16 irq_pending = dib3000mc_read_word(state, 511);
 621
 622         if (irq_pending & 0x1) // failed
 623                 return 1;
 624
 625         if (irq_pending & 0x2) // succeeded
 626                 return 2;
 627
 628         return 0; // still pending
 629 }
 630
 631 static int dib3000mc_tune(struct dvb_frontend *demod)
 632 {
 633         struct dtv_frontend_properties *ch = &demod->dtv_property_cache;
 634         struct dib3000mc_state *state = demod->demodulator_priv;
 635
 636         // ** configure demod **
 637         dib3000mc_set_channel_cfg(state, ch, 0);
 638
 639         // activates isi
 640         if (state->sfn_workaround_active) {
 641                 dprintk("SFN workaround is active\n");
 642                 dib3000mc_write_word(state, 29, 0x1273);
 643                 dib3000mc_write_word(state, 108, 0x4000); // P_pha3_force_pha_shift
 644         } else {
 645                 dib3000mc_write_word(state, 29, 0x1073);
 646                 dib3000mc_write_word(state, 108, 0x0000); // P_pha3_force_pha_shift
 647         }
 648
 649         dib3000mc_set_adp_cfg(state, (u8)ch->modulation);
 650         if (ch->transmission_mode == TRANSMISSION_MODE_8K) {
 651                 dib3000mc_write_word(state, 26, 38528);
 652                 dib3000mc_write_word(state, 33, 8);
 653         } else {
 654                 dib3000mc_write_word(state, 26, 30336);
 655                 dib3000mc_write_word(state, 33, 6);
 656         }
 657
 658         if (dib3000mc_read_word(state, 509) & 0x80)
 659                 dib3000mc_set_timing(state, ch->transmission_mode,
 660                                      BANDWIDTH_TO_KHZ(ch->bandwidth_hz), 1);
 661
 662         return 0;
 663 }
 664
 665 struct i2c_adapter * dib3000mc_get_tuner_i2c_master(struct dvb_frontend *demod, int gating)
 666 {
 667         struct dib3000mc_state *st = demod->demodulator_priv;
 668         return dibx000_get_i2c_adapter(&st->i2c_master, DIBX000_I2C_INTERFACE_TUNER, gating);
 669 }
 670
 671 EXPORT_SYMBOL(dib3000mc_get_tuner_i2c_master);
 672
 673 static int dib3000mc_get_frontend(struct dvb_frontend* fe,
 674                                   struct dtv_frontend_properties *fep)
 675 {
 676         struct dib3000mc_state *state = fe->demodulator_priv;
 677         u16 tps = dib3000mc_read_word(state,458);
 678
 679         fep->inversion = INVERSION_AUTO;
 680
 681         fep->bandwidth_hz = state->current_bandwidth;
 682
 683         switch ((tps >> 8) & 0x1) {
 684                 case 0: fep->transmission_mode = TRANSMISSION_MODE_2K; break;
 685                 case 1: fep->transmission_mode = TRANSMISSION_MODE_8K; break;
 686         }
 687
 688         switch (tps & 0x3) {
 689                 case 0: fep->guard_interval = GUARD_INTERVAL_1_32; break;
 690                 case 1: fep->guard_interval = GUARD_INTERVAL_1_16; break;
 691                 case 2: fep->guard_interval = GUARD_INTERVAL_1_8; break;
 692                 case 3: fep->guard_interval = GUARD_INTERVAL_1_4; break;
 693         }
 694
 695         switch ((tps >> 13) & 0x3) {
 696                 case 0: fep->modulation = QPSK; break;
 697                 case 1: fep->modulation = QAM_16; break;
 698                 case 2:
 699                 default: fep->modulation = QAM_64; break;
 700         }
 701
 702         /* as long as the frontend_param structure is fixed for hierarchical transmission I refuse to use it */
 703         /* (tps >> 12) & 0x1 == hrch is used, (tps >> 9) & 0x7 == alpha */
 704
 705         fep->hierarchy = HIERARCHY_NONE;
 706         switch ((tps >> 5) & 0x7) {
 707                 case 1: fep->code_rate_HP = FEC_1_2; break;
 708                 case 2: fep->code_rate_HP = FEC_2_3; break;
 709                 case 3: fep->code_rate_HP = FEC_3_4; break;
 710                 case 5: fep->code_rate_HP = FEC_5_6; break;
 711                 case 7:
 712                 default: fep->code_rate_HP = FEC_7_8; break;
 713
 714         }
 715
 716         switch ((tps >> 2) & 0x7) {
 717                 case 1: fep->code_rate_LP = FEC_1_2; break;
 718                 case 2: fep->code_rate_LP = FEC_2_3; break;
 719                 case 3: fep->code_rate_LP = FEC_3_4; break;
 720                 case 5: fep->code_rate_LP = FEC_5_6; break;
 721                 case 7:
 722                 default: fep->code_rate_LP = FEC_7_8; break;
 723         }
 724
 725         return 0;
 726 }
 727
 728 static int dib3000mc_set_frontend(struct dvb_frontend *fe)
 729 {
 730         struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
 731         struct dib3000mc_state *state = fe->demodulator_priv;
 732         int ret;
 733
 734         dib3000mc_set_output_mode(state, OUTMODE_HIGH_Z);
 735
 736         state->current_bandwidth = fep->bandwidth_hz;
 737         dib3000mc_set_bandwidth(state, BANDWIDTH_TO_KHZ(fep->bandwidth_hz));
 738
 739         /* maybe the parameter has been changed */
 740         state->sfn_workaround_active = buggy_sfn_workaround;
 741
 742         if (fe->ops.tuner_ops.set_params) {
 743                 fe->ops.tuner_ops.set_params(fe);
 744                 msleep(100);
 745         }
 746
 747         if (fep->transmission_mode  == TRANSMISSION_MODE_AUTO ||
 748             fep->guard_interval == GUARD_INTERVAL_AUTO ||
 749             fep->modulation     == QAM_AUTO ||
 750             fep->code_rate_HP   == FEC_AUTO) {
 751                 int i = 1000, found;
 752
 753                 dib3000mc_autosearch_start(fe);
 754                 do {
 755                         msleep(1);
 756                         found = dib3000mc_autosearch_is_irq(fe);
 757                 } while (found == 0 && i--);
 758
 759                 dprintk("autosearch returns: %d\n",found);
 760                 if (found == 0 || found == 1)
 761                         return 0; // no channel found
 762
 763                 dib3000mc_get_frontend(fe, fep);
 764         }
 765
 766         ret = dib3000mc_tune(fe);
 767
 768         /* make this a config parameter */
 769         dib3000mc_set_output_mode(state, OUTMODE_MPEG2_FIFO);
 770         return ret;
 771 }
 772
 773 static int dib3000mc_read_status(struct dvb_frontend *fe, enum fe_status *stat)
 774 {
 775         struct dib3000mc_state *state = fe->demodulator_priv;
 776         u16 lock = dib3000mc_read_word(state, 509);
 777
 778         *stat = 0;
 779
 780         if (lock & 0x8000)
 781                 *stat |= FE_HAS_SIGNAL;
 782         if (lock & 0x3000)
 783                 *stat |= FE_HAS_CARRIER;
 784         if (lock & 0x0100)
 785                 *stat |= FE_HAS_VITERBI;
 786         if (lock & 0x0010)
 787                 *stat |= FE_HAS_SYNC;
 788         if (lock & 0x0008)
 789                 *stat |= FE_HAS_LOCK;
 790
 791         return 0;
 792 }
 793
 794 static int dib3000mc_read_ber(struct dvb_frontend *fe, u32 *ber)
 795 {
 796         struct dib3000mc_state *state = fe->demodulator_priv;
 797         *ber = (dib3000mc_read_word(state, 500) << 16) | dib3000mc_read_word(state, 501);
 798         return 0;
 799 }
 800
 801 static int dib3000mc_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
 802 {
 803         struct dib3000mc_state *state = fe->demodulator_priv;
 804         *unc = dib3000mc_read_word(state, 508);
 805         return 0;
 806 }
 807
 808 static int dib3000mc_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 809 {
 810         struct dib3000mc_state *state = fe->demodulator_priv;
 811         u16 val = dib3000mc_read_word(state, 392);
 812         *strength = 65535 - val;
 813         return 0;
 814 }
 815
 816 static int dib3000mc_read_snr(struct dvb_frontend* fe, u16 *snr)
 817 {
 818         *snr = 0x0000;
 819         return 0;
 820 }
 821
 822 static int dib3000mc_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 823 {
 824         tune->min_delay_ms = 1000;
 825         return 0;
 826 }
 827
 828 static void dib3000mc_release(struct dvb_frontend *fe)
 829 {
 830         struct dib3000mc_state *state = fe->demodulator_priv;
 831         dibx000_exit_i2c_master(&state->i2c_master);
 832         kfree(state);
 833 }
 834
 835 int dib3000mc_pid_control(struct dvb_frontend *fe, int index, int pid,int onoff)
 836 {
 837         struct dib3000mc_state *state = fe->demodulator_priv;
 838         dib3000mc_write_word(state, 212 + index,  onoff ? (1 << 13) | pid : 0);
 839         return 0;
 840 }
 841 EXPORT_SYMBOL(dib3000mc_pid_control);
 842
 843 int dib3000mc_pid_parse(struct dvb_frontend *fe, int onoff)
 844 {
 845         struct dib3000mc_state *state = fe->demodulator_priv;
 846         u16 tmp = dib3000mc_read_word(state, 206) & ~(1 << 4);
 847         tmp |= (onoff << 4);
 848         return dib3000mc_write_word(state, 206, tmp);
 849 }
 850 EXPORT_SYMBOL(dib3000mc_pid_parse);
 851
 852 void dib3000mc_set_config(struct dvb_frontend *fe, struct dib3000mc_config *cfg)
 853 {
 854         struct dib3000mc_state *state = fe->demodulator_priv;
 855         state->cfg = cfg;
 856 }
 857 EXPORT_SYMBOL(dib3000mc_set_config);
 858
 859 int dib3000mc_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, struct dib3000mc_config cfg[])
 860 {
 861         struct dib3000mc_state *dmcst;
 862         int k;
 863         u8 new_addr;
 864
 865         static u8 DIB3000MC_I2C_ADDRESS[] = {20,22,24,26};
 866
 867         dmcst = kzalloc(sizeof(struct dib3000mc_state), GFP_KERNEL);
 868         if (dmcst == NULL)
 869                 return -ENOMEM;
 870
 871         dmcst->i2c_adap = i2c;
 872
 873         for (k = no_of_demods-1; k >= 0; k--) {
 874                 dmcst->cfg = &cfg[k];
 875
 876                 /* designated i2c address */
 877                 new_addr          = DIB3000MC_I2C_ADDRESS[k];
 878                 dmcst->i2c_addr = new_addr;
 879                 if (dib3000mc_identify(dmcst) != 0) {
 880                         dmcst->i2c_addr = default_addr;
 881                         if (dib3000mc_identify(dmcst) != 0) {
 882                                 dprintk("-E-  DiB3000P/MC #%d: not identified\n", k);
 883                                 kfree(dmcst);
 884                                 return -ENODEV;
 885                         }
 886                 }
 887
 888                 dib3000mc_set_output_mode(dmcst, OUTMODE_MPEG2_PAR_CONT_CLK);
 889
 890                 // set new i2c address and force divstr (Bit 1) to value 0 (Bit 0)
 891                 dib3000mc_write_word(dmcst, 1024, (new_addr << 3) | 0x1);
 892                 dmcst->i2c_addr = new_addr;
 893         }
 894
 895         for (k = 0; k < no_of_demods; k++) {
 896                 dmcst->cfg = &cfg[k];
 897                 dmcst->i2c_addr = DIB3000MC_I2C_ADDRESS[k];
 898
 899                 dib3000mc_write_word(dmcst, 1024, dmcst->i2c_addr << 3);
 900
 901                 /* turn off data output */
 902                 dib3000mc_set_output_mode(dmcst, OUTMODE_HIGH_Z);
 903         }
 904
 905         kfree(dmcst);
 906         return 0;
 907 }
 908 EXPORT_SYMBOL(dib3000mc_i2c_enumeration);
 909
 910 static const struct dvb_frontend_ops dib3000mc_ops;
 911
 912 struct dvb_frontend * dib3000mc_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, struct dib3000mc_config *cfg)
 913 {
 914         struct dvb_frontend *demod;
 915         struct dib3000mc_state *st;
 916         st = kzalloc(sizeof(struct dib3000mc_state), GFP_KERNEL);
 917         if (st == NULL)
 918                 return NULL;
 919
 920         st->cfg = cfg;
 921         st->i2c_adap = i2c_adap;
 922         st->i2c_addr = i2c_addr;
 923
 924         demod                   = &st->demod;
 925         demod->demodulator_priv = st;
 926         memcpy(&st->demod.ops, &dib3000mc_ops, sizeof(struct dvb_frontend_ops));
 927
 928         if (dib3000mc_identify(st) != 0)
 929                 goto error;
 930
 931         dibx000_init_i2c_master(&st->i2c_master, DIB3000MC, st->i2c_adap, st->i2c_addr);
 932
 933         dib3000mc_write_word(st, 1037, 0x3130);
 934
 935         return demod;
 936
 937 error:
 938         kfree(st);
 939         return NULL;
 940 }
 941 EXPORT_SYMBOL(dib3000mc_attach);
 942
 943 static const struct dvb_frontend_ops dib3000mc_ops = {
 944         .delsys = { SYS_DVBT },
 945         .info = {
 946                 .name = "DiBcom 3000MC/P",
 947                 .frequency_min      = 44250000,
 948                 .frequency_max      = 867250000,
 949                 .frequency_stepsize = 62500,
 950                 .caps = FE_CAN_INVERSION_AUTO |
 951                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 952                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 953                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 954                         FE_CAN_TRANSMISSION_MODE_AUTO |
 955                         FE_CAN_GUARD_INTERVAL_AUTO |
 956                         FE_CAN_RECOVER |
 957                         FE_CAN_HIERARCHY_AUTO,
 958         },
 959
 960         .release              = dib3000mc_release,
 961
 962         .init                 = dib3000mc_init,
 963         .sleep                = dib3000mc_sleep,
 964
 965         .set_frontend         = dib3000mc_set_frontend,
 966         .get_tune_settings    = dib3000mc_fe_get_tune_settings,
 967         .get_frontend         = dib3000mc_get_frontend,
 968
 969         .read_status          = dib3000mc_read_status,
 970         .read_ber             = dib3000mc_read_ber,
 971         .read_signal_strength = dib3000mc_read_signal_strength,
 972         .read_snr             = dib3000mc_read_snr,
 973         .read_ucblocks        = dib3000mc_read_unc_blocks,
 974 };
 975
 976 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
 977 MODULE_DESCRIPTION("Driver for the DiBcom 3000MC/P COFDM demodulator");
 978 MODULE_LICENSE("GPL");